Insulating Membrane Roof

The old roof was tar and gravel so the switch to tpo should show significant change. A vapour membrane is also a likely requirement to stop moisture which is naturally generated in an occupied room. Without a membrane vapour would rise and penetrate into the roof and insulation.

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The lwic systems are composed of either aggregate or cellular concrete.

Insulating membrane roof.

Installed a new fully adhered membrane to the top of the old board sheathing prior to adding all that rigid insulation. Roof membrane ybs insulation manufacture specially designed roofing membranes which allow the roof to breath and help protect against the ingress of wind rain and snow. Roof edge detail overhang extended to hide the thickness of the over roofing rigid insulation. How to install insulation board over an existing roof membrane.

It is an acceptable practice to install a new roof over an existing roof membrane system provided that the roof deck is. Lightweight insulated concrete also known as lwic is a material intended for use as an insulation and substrate for support and attachment of roofing membranes on slope roofs. I have an insulation factor of about 8 10 plus the reflectivity of the white tpo. Also there is a soffit vent but none at roof peak.

Is there any advantage to trying to get any insulation in between the 2 8 rafters. Gable end detail overhang cut and then rebuilt to hide the thickness of the over roofing rigid insulation. Depending on your needs there are different variations of roofing membrane to choose from ranging from the lightweight to heavy weight. Should i leave out the soffit vent.

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